Improvement in middlings-purifiers



2 sheets Sheet 1.

c. s. FULLER. MiddlingS-Purifiers'.

Patented N 0v c S FULLER. 2Sheets--Sheet2.

Middlin s-Purifiers. N0. 144,329. g Patented Nov-4,1873

IIII

CLARK S. FULLER, OF OSWEGO, NEW'YORK.

IMPROVEMENT IN MlDDLINGS-PURIFIERS.

Specification forming part of Letters Patent No. 144.3%), dated November4, 1873; application filed October 20, 1873.

To all whom it may concern:

Be it known that I, CLARK S. FU LER, of.

the city and county of Oswego, in the State of New York, have inventedcertain Improvements in Middlings-Purifiers, of which the following is aspecification:

My invention consists in the combination, with an exhaust-chamber, of arapidly-rotating brush or beater, arranged horizontally, and a concaveprovided with a corrugated or otherwise roughened surface, between whichthe unpurified middlings are fed and subjected to the scouring orbeating action thereof, from and by which the material thus beaten andagitated is thrown into or across the exhaustchamber, where it issubjected to the action of an upward air-current, which, in passingthrough the diffused and scattered material, separates and carries offwith it the fibrous particles and other light impurities which have beendetached by the beater, while the heavier granules or good middlingsdescend by gravity into a discharge-hopper at the bottom of theexhaust-chamber.

In the accompanying drawings, consisting of two sheets, Figure 1 is aperspective view with portions of the case broken away. Fig. 2 is atransverse vertical section. Fig. 3 is a plan, of a modified form, of myimproved machine. Fig. 4 is a transverse vertical section thereof inline a: w of Fig. 31

Like letters of reference designate like parts in each of the figures.

A is the case of the machine, supported by any suitable frame. B is acylindrical brush, arranged horizontally at one side of the case orchamber, and G is a concave arranged underneath the brush, and formedwith longitudinal corrugations. D is a trough or chamber arranged at thetop of the chamber, provided with a' right-and-left-hand conveyor, 0,which conducts the middlings fed through a spout, f, at the centertoward/each end, so as to distribute them uniformly into a passage, g,that discharges them between the brush and concave. H is a hopper at thebottom of the case A, terminating in a trough provided with a suitableconveyer for conducting the purified middlings to a discharge-spout atone end. Suit-able openings, 27, regulated by valves, admit air into thebottom of the case or chamber A, while a tube leads from the top of thischamber to the eye of a fan or other air-exhausting apparatus. The shaftof the brush revolves in adjustable bearings, k, by which the frictionbetween the brush and concave is regulated. Motion is communicated tothe brush and conveyors by pulleys and belts in any suitable manner.

The effect of the corrugations of the concave 'is to give to thematerial as it is brushed by them a rebounding flirting action, by whichthe material is more thoroughly whipped and scoured, and the particlesof fibrous matter, smut, and other refuse detached from the granules ofgood middlings, as they are thrown from the brush into and across thecentral portion of the chamber. The current of air passing upwardarrests and carries upward with it to the fan the lighter impurities,while the granules or good middlings fall into the hopper and aredischarged, as above described.

In Figs. 3 and 4, asecond brush, L, and concave M, similar to B O, arearranged in the opposite side of the exhaust-chamber, a little below BO. The middlings are discharged from the first brush and cylinder withsufficient force to cause them to fall onto an inclined board or hopper,n, which conducts them between the brush and concave L M, where they aresubjected to a second scouring orwhipping, and from which they arethrown back into the central portion of the chamber, when they are asecond time subjected to the action of the as cending current of air.

Plain heaters may be used instead of the brush-cylinder, with stationarybrushes attached to the face of the concave, and used instead of thecorrugations, or the concave may be left plain; but in the latter case abrushcy1inder should be employed. I prefer, however, to use thebrush-cylinder and corrugated concave, as shown in the drawings.

My improved apparatus is specially adapted for the first treatment ofmiddlings, although it is obvious that any of the other grading orseparating machines may be used in connec tion with my improved machine,for operating on the material either before or after it has passedthrough my machine.

I do not wish to be understood as claiming, broadly, the combination ofa whipper or dis ()rrron.

integrator with an exhaust-chamber, as the 2. The combination andarrangement in an same is shown and described in a previousexhaust-chamber, and with the beater and conpending application made bymyself and ancave B O, of the beater and concaveL M, subother partyjointly; but stantially as and for the purpose hereinbefore What I claimas my invention issetfort-h. 1. The combination of the brush B and con-CLARK S. FULLER. cave G with an exhaust-chamber, across which Witnesses:the middlings are thrown by the brush sub- 0. H. BROWN, stantially asand for the purposes set forth. WM. 0. MOINTIRE.

